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United States Patent | 6,154,455 |
Mekkoth ,   et al. | November 28, 2000 |
This invention teaches methods, and circuits that operate in accordance with the methods, for improving the management and control of pilot channel sets for a CDMA mobile station. In one aspect a Priority Neighbor Search technique is provided, wherein a list of Priority Neighbor pilot channels is maintained and searched with a higher priority than the Neighbor Set pilot channels. In a further aspect this invention provides a Dropped Pilot Channel Search technique wherein a set is made of the last pilot channel or pilot channels dropped from the Active Set, wherein the dropped pilot channels are searched for some period of time with a higher priority than the Neighbor Set pilot channels. This invention also provides a High Priority Search Set feature which includes members of the Active Set, the Candidate Set, the Dropped Pilot Set, and the Priority Neighbor Set.
Inventors: | Mekkoth; Ajith (San Diego, CA); Yeoman; Darin (Escondido, CA); Gould; Adam (San Diego, CA); Dowling; Joe (San Diego, CA) |
Assignee: | Nokia Mobile Phones Limited (Espoo, FI) |
Appl. No.: | 998171 |
Filed: | December 24, 1997 |
Current U.S. Class: | 370/342; 370/320; 370/332; 370/335; 455/442; 455/443 |
Intern'l Class: | H04J 013/00 |
Field of Search: | 370/241,331,332,335,342,311,320,397,399,209,208 455/436,437,438,439,440,442,443,67.1 |
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